of the ''Genus ^' Peneuii. 527 



being deeply cleft at its after end. The sixth abdominal 

 somite is nearly twice as long as tiie fifth, but shorter than 

 the telson. The telson is about as long as the inner caudal 

 swimmeret ; it ends very acutely and has near the apex four 

 pairs of large marginal spines, the last pair being fixed. 



Eyes large. Antennular flagella equal, about one third 

 the length of their peduncle. 



The third niaxillipeds nearly reach the tip o£ the antennal 

 scale ; the dactylus is slender «nd is not much shorter than 

 the propodite, with which it articulates end on ; the basis 

 bears an antrorse spine. A similar spine is present on the 

 basis of the first two chelipeds and on the ischium of the 

 first. 



In the female only there i-; a pair of sternal spines between 

 the second pair of chelipeds. 



All the thoracic legs have longish exopodites. 



The andricum, which is built in the same way as that of 

 M. coniger, is asymmetrical, the left lobe being the longer; 

 the outer lobule of the left lobe ends in a crown of stiffish 

 filaments. 



The thelycum consists of the following parts : — (1) between 

 the fifth pair of legs a transverse lamina more or less dis- 

 tinctly divided into three lobes, the outer of which (abutting 

 on the fifth legs) are bluntly dentiform ; (2) between the 

 fourth pair oi' legs a broad transverse plate, the anterior part 

 of which shows as a large, smooth, somewhat oval facet ; 

 (3) in the interval between the fourth and fifth legs a narrow 

 transverse bar, sinuous and shaped like a very open W. 



Large females may attain a length of 3J inches. 



The species has been taken in abundance all along the 

 east coast of the Peninsula where any rocky patches occur, 

 from Orissa to Palk Strait, in 20-35 fathoms ; in the Gulf of 

 Martaban, in 20 fathoms ; and at various places in the 

 Andaman s, in 20 fathoms. 



4. Parapeneopsis maxillipedo, sp. n. ? 



? an Peneus cormdus, Kishinouve, Jouiii. Fish. Bureau, Tolivo, viii. 

 1903, i. p. 23. 



Compared with Parapeneopsis siylifera (Edvv.) it presents 

 the following differences ; — 



The dorsal half of the carapace is tomentose. The rostrum 

 is recurved at tip, but otherwise is nearly horizontal ; it does 

 not reach the end of the antennular peduncle in either ^^ex, 

 and it is armed dorsally Avith 8-10 teeth (not including the 

 isolated epigastric tooth), which form a very decided crest. 



